S
M
T
W
T
F
S
30
82°
61°
31
80°
55°
1
78°
54°
2
74°
55°
3
74°
55°
4
75°
56°
5
74°
54°
6
73°
54°
7
73°
55°
8
74°
54°
9
73°
56°
10
71°
53°
11
73°
53°
12
74°
55°
13
72°
54°
14
74°
53°
15
71°
52°
16
71°
51°
17
69°
52°
18
70°
52°
19
70°
56°
20
72°
55°
21
73°
49°
22
68°
48°
23
Hist. Avg.
70°
49°
24
Hist. Avg.
70°
49°
25
Hist. Avg.
70°
48°
26
Hist. Avg.
70°
48°
27
Hist. Avg.
69°
48°
28
Hist. Avg.
69°
47°
29
Hist. Avg.
68°
47°
30
Hist. Avg.
68°
46°
1
Hist. Avg.
68°
46°
2
Hist. Avg.
67°
46°
3
Hist. Avg.
67°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Westhampton Beach
Westhampton Beach's September 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 48° and 61°. The average high for September is 73° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Westhampton Beach. See also: October | November | December.
